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glnitrh tatrs4 @anni @fitta GASPAR` ZWICKI, OF CHICAGO, ILLINOIS, ASSIGNOR TO JAMES J. WAL- W ORTHAN D GUSTAVIIS E. BASCHICK.

Letters Patent No. 63,353, dated March 26, 1867.

IMPROVEMENT IN LOOMS.

'.IO ALL WIIOM IT MAY CONCERN:

Be it known that I, GASPAR Z-WIGKI, of Chicago,.in Cook county, State of Illinois, but formerly oi' Pittsburg, Pennsylvania, have invented certain new and useful Improvements in Looms; and I do hereby declare that the following, taken in connection with the drawings, which accompany and form part of this specification, is a` description of my invention suliicient to enable.those skilled in the art to practise it.

My invention relates, lirst, to the detail of construction by which suiicient elasticity is obtained to prevent jar of' the parts when the loom is run at a high rate of speed, and by which slight but needed adjustments of the shuttle-race may be obtained; secondly, to the construction of an adjustable spring catch at each end of the shuttle-race operating to stop the Hight of the shuttle and to retain it in its proper position in the shuttle race and preventing it from iiying out of the race onzreceiving a blow from either picker stall' when the loom is operated at ahigh speed; thirdly, to the combination with devices for operating the picker stati' ot' a cam, which, by adjustment, is capable of regulating the blow of the picker stad'. Of the drawings- Figure 1 shows in front elevation a loom embodying my invention.

Figure 2 is a plan of one end of the shuttle-race.

Figure 3 is an end view of the loom aforesaid.

Figure 4 is a cross-section taken through the loom on the line e z, fig. I.

Figures ,5 and 6 are respectively a side view and a plan ot' my shuttle; and

Figures 7 and 8 are perspectiverviews of the same.

A represents the frame of the loom, and B the main, shaft, which is rotated by belting upon the pulleys C. In this shaft B are the cranks x, which operate to vibrate the shuttlerace-E through the connecting-rods D and the spring-supported links D', the connecting-rods D taking hold of the crank :z: and being pivoted to the links D by the pins a, the other ends of the links D being pivoted to the radius arms to which the shuttle-race E is fixed and with which it vibrates on the fulcrum G. The links D are upheld and are kept from falling by spring- Supports or braces, F, which are made in two pieces, eachiso connected by bolts and slotted holes for the same, as shown at b, that each spring-brace, F, can be lengthencd or shortened so as to raise or lower the links D and thus nicely adjust either or both ends of the shuttlerace relatively to the cranks The function ofthe springbraces F is to yield slightly when the connecting-rods D act upon the links D at considerable angle so as to give an elasticity to the movement oi' the shuttle-race and to. avoid jar and strain of the machine when it is made to move at a high rate of speed, and is desiguedas an improvement upon looms using, to drive the shuttlera-ce, connecting-rods, which are of very short length as compared with the radii of the shuttle-race drivingcranks. The consequence of using such short connecting-rods is, that when the shuttle-race is drawn back from the lay it rests or remains nearly or quite still at the time when the shuttle is driven through the shed of the warp threads, which are then fully open, so that the shuttle in its passage cannot touch or break any otsaid threads. Above each end of the shuttle-race E are springs, H, each fastened to holding pieces e, on the side 0i' the race, so that they can be adjusted in a vertical direction, and provided with a set or thumb-screw atf, for the purpose of further adjustment of the free end of said spring H ina vertical direction. The function ot' these springs I-I is to stop the shuttle gradually and without recoil, and to keepit in its proper position on the shuttlerace to receive the blows of the picker stalls T. The ends ol' the cavities h in the lower sides of each end of the shuttle K are square or right angular to the line of the shuttles ilight, which line is parallel with the face l of the shuttle bearing against the reed L, and is also parallel with the lower surface of the shuttle which rests upoi the upper surface of the shuttle-race E, the cavities being of suiiicient depth and width to admit freely therein the ends ofthe picker staffs T, which project above the upper surface of the shuttle-race. On the lower shaft M, which is driven by gearing from the main shaft B, are the picker-staff driving-cams N, having therein blocks, 0, made to slide so as to be adjustable, being fastened in any desirable position by a clamp-screw at s. The length of stroke given by the picker stals is regulated by adjusting the block o either from or toward the centre of the shaft M, as may be required.

I claim combining with the shuttle-race, and with the cranks and connecting-rods which actuate it, the links D, when upheld by spring braces capable of vertical adjustment, and which, acting by their elasticity, ease the movements of the shuttle-race, substantially as described.

Also, in combination with thc shuttle-race, the springs H at either end, arrangedover the to'p ofthe shuttlepath, and provided with means for'vertical adjustment, substantially as described.

And, in combination with the picker sta-if of a loom, the cam ll,`when provided with the adjustable piece 0,

substantially as described.

GASPAR ZWICII.

Witnesses:

H. N. Herr, j

CONRADL. Drent. 

